fuel delivery code .....0148.......
Lead Driver
Joined: Sep 2012
Posts: 7,833
Likes: 96
From: Manteca,Ca
reps when I canP0148:
Fuel Delivery Error: Power Monitor Activated. actual RPM's exceed requested RPM's (by the PCM) which can be caused by an alternative fuel source, CKP or CMP interference (electrical) or a faulty PCM.
In other words, something is making your engine run faster than the PCM wants it to OR something is telling the PCM the engine is running faster than it's supposed (whether this is really happening or not).
Fuel Delivery Error: Power Monitor Activated. actual RPM's exceed requested RPM's (by the PCM) which can be caused by an alternative fuel source, CKP or CMP interference (electrical) or a faulty PCM.
In other words, something is making your engine run faster than the PCM wants it to OR something is telling the PCM the engine is running faster than it's supposed (whether this is really happening or not).
Fleet Owner
Joined: Nov 2003
Posts: 27,922
Likes: 3,640
The PC/ED manual says to go to PinPoint Test AT.
Below is an old link to that test:
https://www.ford-trucks.com/forums/6...ml#post4923250
My manual has some updates to the link above.
AT5 is the specific test for the P0148 code.
It says:
Possible causes
- fuel quality
- CKP or CMP signal noise
Retrieve ALL DTC's
Carry out a drive cycle
Reflash the PCM, if the P0148 DTC is still present, then install a new PCM.
According the the manual, when an rpm differential occurs (rpms higher than expected), the DEPM diables the CKP and CMP output signals sent by the PCM to the FICM.
I believe that inspecting the CKP and CMP wiring would be a good idea and then also testing the harnesses. I would also think that a crankcase pressure test would be a good one to do. After that (as indicated above), it seems that clearing the codes, resetting the KAM, and then completing a few drive cycles would be good to see if it (or other DTCs) comes back. Ultimately, it may mean reflashing the PCM or even a new PCM (if no other issues are discovered).
Below is an old link to that test:
https://www.ford-trucks.com/forums/6...ml#post4923250
My manual has some updates to the link above.
AT5 is the specific test for the P0148 code.
It says:
Possible causes
- fuel quality
- CKP or CMP signal noise
Retrieve ALL DTC's
Carry out a drive cycle
Reflash the PCM, if the P0148 DTC is still present, then install a new PCM.
According the the manual, when an rpm differential occurs (rpms higher than expected), the DEPM diables the CKP and CMP output signals sent by the PCM to the FICM.
I believe that inspecting the CKP and CMP wiring would be a good idea and then also testing the harnesses. I would also think that a crankcase pressure test would be a good one to do. After that (as indicated above), it seems that clearing the codes, resetting the KAM, and then completing a few drive cycles would be good to see if it (or other DTCs) comes back. Ultimately, it may mean reflashing the PCM or even a new PCM (if no other issues are discovered).
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
An unknown fuel source such as crankcase oil from something like excess blow by (as Mark indicated by a pressure test) or leaking compressor side turbo seal.
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
Thread Starter
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Mountain Pass
Joined: Apr 2012
Posts: 198
Likes: 10
From: SW PA in the BC
Well here it is in a nut shell.......spent most of the morning looking for a short......couldn't find one......so I proceeded to un tune.......back to stock.....cleared codes.....and then ran truck to see what codes......pulled up more codes......main one I found interesting.....0603......has something to do with memory........I think the computer is taking a ****......oya and the overhead comp. Keeps resetting to mpg......and I made sure that was an unbiased test......did it 5 times in a row.....as soon as you shut off truck
Post Fiend
Joined: Aug 2010
Posts: 13,710
Likes: 5
From: Manchester, CT
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Posting Guru
Joined: Jun 2012
Posts: 1,452
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From: Nor Cal
Might want to research blanking the memory. Has something to do with disconnecting the battery cables and holding the + and - together and the truck will go thru a relearn process. Probably won't work but who knows?
could this be another DUMB post by you know who? ????
could this be another DUMB post by you know who? ????
Thread Starter
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Mountain Pass
Joined: Apr 2012
Posts: 198
Likes: 10
From: SW PA in the BC
If it nothing to worry about.....why would they put a code for it? And why is my overhead system monitor keep resetting.....
Lead Driver
Joined: Sep 2012
Posts: 7,833
Likes: 96
From: Manteca,Ca
Mike, did you look at the mentioned sensers CKP CMP and connections? I would pull the Three FICM connections and look real close at the pins too, maybe the connections clip is snaped off and not making good contact, Use a little Dio Grease to help slip them back in, I use 2 1x2 one across and one to slip the connection in seems to help .If the clip is snap put a zip tie on to keep the connection on.
Thread Starter
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Mountain Pass
Joined: Apr 2012
Posts: 198
Likes: 10
From: SW PA in the BC
Yes looked at all of them used silicone grease.....easily available @ work.....pulled all the sensors .....connectors..... had a truck that acted up from road salt .....just want to cover all the bases...hate to just throw parts at it....but the wierd codes got me baffled and with the overhead computer.......with the fuel mileage on it keeps resetting .......probably expensive....needing replaced....would there be a connection to the PCM?
Fleet Owner
Joined: Nov 2003
Posts: 27,922
Likes: 3,640
Might want to research blanking the memory. Has something to do with disconnecting the battery cables and holding the + and - together and the truck will go thru a relearn process. Probably won't work but who knows?
could this be another DUMB post by you know who? ????
could this be another DUMB post by you know who? ????